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The
Diablo 2 v1.10 Skill Planner is a free service provided by d2items.com. Use
it to explore character possibilities without wasting skill points.

The Skill Planner will allow you to add a point whether you have
the required prerequisites or not. Don't forget to account
for the prereqs when planning your character.

Everything is pretty self-explanitory. It operates like the
real game interface, for the most part.Select your character class at the top.Select the skill tree from the tabs on the right.Left-Click a skill to add 1 point. Right-Click a skill to remove
1 point.If you need to add a large number of points, you can select the number
with your mouse and manually edit it.Click the Cancel Button ?to reset all skills to 0.Some skills have varying stats in different diffculties, such as
the Necromancer's Summons. These are shown as follows:

If you had 5x +1 Skill Cold Skill Charms, the skills would both independently
operate at level 6. However, Frozen Orb will not receive a
level 6 Ice Bolt bonus. It will only receive a level 1 Ice
Bolt bonus because you only have 1 real point spent in Ice Bolt. So,
you'd basically have Level 6 Frozen Orb with a level 1 synergy bonus. If
you wanted to increase the synergy bonus, you'd need to spend more
real points in Ice Bolt.

To account for this, there are boxes on each skill tab, as well as
one at the top-right (for + all skills). Each box should be
used for skill bonuses from items. If I were going to check
the skills for the above mentioned Sorceress, I'd put 1 point into
Ice Bolt and 1 point into Frozen Orb, then plug in 5 to the + [ ]
to Cold Skills box. If I'd put Ice Bolt at 6 by adding skill
points directly to it, Frozen Orb would show stats for a level 6
synergy. Use the boxes to properly calculate synergy bonuses.